mouthful
柯林斯词典
1. N-COUNT A mouthful of drink or food is the amount that you put or have in your mouth. 一口 (食物或饮料)
She gulped down a mouthful of coffee. 她咽下了一大口咖啡。
2. N-SING If you describe a long word or phrase as a mouthful, you mean that it is difficult to say. 长而绕嘴的字词[非正式]
It's called the Pan-Caribbean Disaster Preparedness and Prevention Project, which is quite a mouthful. 它被称为泛加勒比海灾难准备及预防计划，挺绕嘴的一个名字。
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mouthful /ˈmaʊθˌfʊl/ (mouthfuls)
剑桥词典
mouthful noun (AMOUNT)
[ 可数名词：有复数形式的名词 ]an amount of food or drink that fills your mouth , or that you put into your mouth at one time
满口；一口
He only ate a few mouthfuls of meat . 他只吃了几口肉。
mouthful noun (WORD)
[ 单数名词 ] informala word or phrase that is difficult to pronounce or that has a lot of syllables
冗长而拗口的词（或词组），难读的词（或词组）
I've always called myself Henny because it's less of a mouthful than Henrietta. 我总是叫自己“亨尼”，因为它不像“亨丽埃塔”那么拗口。